121222020200021 has 8 divisors (see below), whose sum is σ = 132199282010880. Its totient is φ = 110480828535792.

The previous prime is 121222020199963. The next prime is 121222020200053. The reversal of 121222020200021 is 120002020222121.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 121222020200021 - 2¹⁸ = 121222019937877 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121222020202021) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 59017535585 + ... + 59017537638.

It is an arithmetic number, because the mean of its divisors is an integer number (16524910251360).

Almost surely, 2^{121222020200021} is an apocalyptic number.

It is an amenable number.

121222020200021 is a deficient number, since it is larger than the sum of its proper divisors (10977261810859).

121222020200021 is a wasteful number, since it uses less digits than its factorization.

121222020200021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118035073315.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 121222020200021 its reverse (120002020222121), we get a palindrome (241224040422142).

The spelling of 121222020200021 in words is "one hundred twenty-one trillion, two hundred twenty-two billion, twenty million, two hundred thousand, twenty-one".